Control means for pneumatic ejectors



July 12, 1.932. L HQLLY 1,866,8Q6

CONTROL MEANS FOR PNEUMATIC EJECTORS Original Filed May 1, 192a ill VIII/III! XNVENTOR 5.17 HQZZZ Jill/s ATTORNEY Patented July 12, 1932 UNITED STATES PATENT OFFICE LUDWIG F. HOLLY, OF MADISON, NEW JERSEY, ASSIGNOR T HOLLY PNEUMATIC SYS- TEMS, INCt, OF NEW YORK, N. Y.,

A CORPORATION OF NEW YORK CONTROL MEANS FOR PNEUMATIC EJEOTORS Original application filed May 1, 1926, Serial No. 105,936. Divided and. this application filed April 2, 1929. Serial No. 352,042.

This invention relates to control means for pneumatic ejectors, the sub ectniatter of this application constituting a dlvision of my pending application for patent on apparatus and method for loading loose bulk cargoes, filed May 1, 1926, Serial No. 105,936, now Patent No. 1,708,176, issued April 8, 1929.

It is the primary object and purpose of the present invention to provide a slmple and easily operable control means whereby the velocity and angle of discharge of a granular or comminuted material from an e ector nozzle may be varied and regulated as de- 16 sired. It is also another object of the in vention to provide means carried by the ejector nozzle for regulating and controlling the velocity of the compressed air blast at its point of impact upon the material.

More particularly, in one practical embodiment of the invention, I provide in the discharge end of the ejector nozzle vertically spaced pivotally mounted plates defimng the area of the discharge outlet together wlth 5 means for adjusting one of said plates relative to the other whereby the effective outlet area may be varied and for also adjusting said plates as a unit with respect to the nozzle to change the angle of discharge or trajectory of the stream of material.

It is a further general object of the invention to provide a control means for such pneumatic ejectors which may be advantageously employed for the trimming of loose bulk cargoes, and for the purposes, and which is of simple and durableconstruction, not likely to get out of order and capable of production at nominal cost. 7

With the above and other objects in view, the invention consists in the improved control means for pneumatic ejectors, and in the form, proportion and relative arrangement of the several parts thereof as will be here 4 inafter more fully described, illustrated in the accompanying drawing, and subsequently incorporated in the subjoined claims.

In the drawing, wherein I have illustrated one simple and satisfactory embodiment of the invention, and in which similar reference characters designate corresponding parts throughout the several views,-

Figure 1 is a horizontal sectional view taken substantially on the line 1-1 of Fig. 2, the ejector nozzle being partly shown in sec- 5 tion;

Fig. 2 is a side elevation showing the ejector nozzle connected with the material and compressed air supply conduits, parts thereof being shown in section as indicated by the line 22 in Fig. 1, and

Fig. 3 is an end elevation, the lower end of the material conduit being illustrated in section as indicated by the line 33 in Fig. 2.

In the example of my invention which I have selected for purposes of illustration, the ejector nozzle indicated at 15 preferably of rectangular cross sectional form as to the body portion thereof, is connected at its rear end by means of a suitable swivel joint with 7 the tubular elbow 16, which in turn is connected to the lower end of the air supply conduit 14. The rear end of the nozzle 15 is also provided with an angularly projecting branch 17 having a swivel connection with one end of the material supply conduit 18. Through this conduit, the granular material, such as grain, pulverized coal, etc. is fed by gravity to the ejector nozzle 15. If desired, opposite walls of the conduit 13 may be provided with openings 23 and inwardly opening doors 24 therefor pivoted at their lower ends as at 25. When these doors are in the position shown in Fig. 3 of the drawing, the material may flow by gravity from the conduit 13 through the openings 23.

As herein shown, the ejector nozzle 15. is operatively supported in any suitable manner in a substantially horizontal position and at its outlet end, the top wall thereof is preferably upwardly inclined as shown at 26 and within this outlet end of the nozzle the vertically spaced plates 27 are pivotally mounted at their rear ends as at 28. T 0 one end of the pivot rod or axis of the lower plate 27, a lever 29 is fixed and is adapted for movement over a curved slotted arm 30 fixed to the wall of the ejector nozzle. This lever carries an adjustable clamping means 31 extending through the slot of said arm whereby the lever may be fixed in various adjusted positions.

The upper plate 27 has an arm 32 fixed to one end of its pivot rod or axis and projecting rearwardly therefrom, said arm having an adjustable pin and slot connection 33 with one end of a nected at its other end to the lever 29.

From the above construction, it will be evident that by adjusting theconnection between the arm 82 and link 34 the upper plate 27 may be independently adjusted in the outlet of the ejector nozzle with respect to the lower plate 27 so that said plates will bear a desired convergent relation to each other and thus determine the area between the forward ends of said plates to regulate the volume and velocity of discharge of the granular material. By adjusting the lever 29 on the arm 30, the two plates 27 may be moved as a unit in the outlet end of the nozzle, thereby varying the inclination of the lower plate and changing the trajectory or angle of discharge of the ejected stream of material, as may be required in order to direct the material to a certain point or location.

Air is supplied under pressure to the conduit 14 from a suitably located air compressor or pump (not shown) and enters the rear end of the nozzle 15 independently of the material fed through the conduit 13 and in a direction at an angle with respect to the angle of entrance of the material to the nozzle through the branch extension 17 thereof.

For the purpose of horizontally swinging the ejector nozzle to properly distribute the ejected stream of material, said nozzle adj acent its rear end is provided with a vertical pivot or spindle 38 .rotatably mounted in a bracket This bracket carries suitable adjusting screws 40 for bearing engagement against one side of a vertical Wall or bulk head indicated at B.

Upon the spindle 38 a worm gear segment 41 is fixed and meshes with a worm 42 on the shaft 43 driven by a suitable motor 44. This motor is of the reversible type, the operation thereof being automatically reversed at each end of the travel of the worm gear segment 41. However, this means for oscillating the ejector. nozzle, is not claimed herein, since it constitutes part of the subject matter covered by my co-pending application above referred to.

For the purpose of regulating the volume link 84 which is pivotally con-.

and velocity of the air entering the rear end of the nozzle 15 whereby the stream of material may be ejected to the desired distance from the outlet or discharge end of the nozzle, I provide in the rear end of the nozzle an adjustable tongue or plate 46 pivotally mounted at one of its ends. A lever 47 is connected with this plate or tongue by the proper adjustment of which, said plate may be disposed in various angular positions to increase or decrease the area of the passage between this plate and the wall of the nozzle which determines the volume and velocity of the air blast impinging upon the stream of material entering the nozzle at an angle with respect to the air stream through the connection 17. It will also be evident that by such adjustment of the plate 46 and the variation in velocity of the entering air blast, the quantity of material discharged or ejected from the nozzle in any definite predetermined period of time may be regulated and controlled as desired.

From the foregoing description considered in connection with the accompanying drawing, the construction and manner of operation of my improved control means for such pneumatic ejectors will be clearly and fully understood.

While the device was primarily designed for application and use in connection with apparatus for trimming loose bulk cargoes in the holds of vessels so as to properly distrib ute the material to all parts thereof, it will neverthelessbe apparent that the present invention is also easily adaptable to various other analogous uses. It will also be understood that the essential features of the present disclosure might be exemplified in numerous other alternative structural forms, and I accordingly reserve the privilege of resorting to all such legitimate changes in the construction and relative arrangement of the several elements, as may be fairly embodied within the spirit and scope of the invention as claimed.

I claim:

1. A portable ejector nozzle for granular materials having means at one end through which the material and compressed air are supplied to the nozzle in separate streams entering said nozzle along convergent paths, spaced plates pivotally mounted in the discharge end of the nozzle, means for adjusting one of said plates with respect to the other to vary the effective discharge area between said plates, and means for connecting said plates for movement as a unit in the operation of said adjusting means to thereby alter the angle of discharge of the stream of material with respect to the nozzle.

2. An ejector nozzle for granular materials having means at one end through which the material and compressed air are supplied to the nozzle in separate streams entering said nozzle along convergent paths, means adjustably mounted in the discharge end of the nozzle to vary the effective discharge area thereof through which the material is ejected by the compressed air stream, and additional adjustable means mounted in the air inlet end of the nozzle for regulating the volume and velocity of the air stream at its point of impact upon the entering stream of granular material.

In testimony that I claim the foregoing as my invention, I have signed my name hereto.

L. F. HOLLY. 

